Multiple laminated glass



@gavin Apri E2, 3943,.

J. W. KAMERER MULTIPLE LAMINATED GLASS FiledJuly l2, 193i- 0.... .mi i

lsection and then the layers and the covering plates 5 are applied thereto. Manifesti?, however, the same results will beobtained Where the various laminae are built up in a continuous process. One o the covering plates 5 and the intermediate plates 3 could be passed along an endless conveyor under mechanism wherein a layer of cement is applied to one face of each plate and a sheet of the hard type resin interposed therebetween. This simple sandwich is then advanced to a position at which a sheet or layer 2 is applied and the central plate l or glass snperposed thereon. In a. similar manner the additional elements are built up until the unit is complete. After the various elements of the unit have been assembled it is subjected to controlled heat and pressure, in order to bond the separate elements together into a, composite unit. This operation may be performed by placing the units in an autoclave wherein a fluid pressure of approximately 15G pounds per square tions of plastic materials and glass platee may be had and various different modifications oi' the laminating operation resorted to Without departing from the spirit of the invention or the scope of the appended claims.

What I claim is:

1. A multiplate safety glass comprising aplate of glass, the opposite faces of which are covered with ahlayer of a plasticized vinyl acetal resin, two additional plates or glass bonded thereto, layers of a cellulosic plastic material covering the outer faces of the second plates of glass and two plates of glass bonded to the outer layers of lastio material.

2. A-multiplate lsafety glas as dened in claim 1, in which the inner resin layers are of a plasticized polymerized incomplete Vinyl aoetal resin and the outer plastic layers are of cellulose nitrate.

` 3. A moltiplate safety glass comprising a thick central plate ciglass, the opposite faces of which are covered with a layer oi a'plasticized polymerized incomplete vinyl acetal resin, two inter mediate plates of glass 4of a. thickness less than ,l

that of the centrai plate of glass bonded theret, through the medium of tlie resin layers,A layers of cellulose nitrate covering the outer faces of the second layers of glass, and two plates of glass of ar'tloiclmess less than that of the inter mediate plates of glass bonded to the outer layers of cellulose nitrate.

JAMES VJ. KAMERER 

